このイラストのポーズは、片手を頭の後ろに当てて髪をかき上げ、首を伸ばした「シャワーポーズ」（髪を洗うような仕草）です。ボディラインが美しく強調されたセクシーな立ち姿です。
The pose in this illustration is a "shower pose" (a gesture as if washing one's hair), with one hand placed behind the head and the hair pushed back, and the neck stretched out. It's a sexy standing pose that beautifully emphasizes the body lines.
